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Kernel: Make copy_{from,to}_user() return KResult and use TRY()

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This makes EFAULT propagation flow much more naturally. :^)
This commit is contained in:
Andreas Kling 2021-09-05 17:38:37 +02:00
parent 9903f5c6ef
commit 48a0b31c47
57 changed files with 318 additions and 551 deletions
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9
Kernel/UserOrKernelBuffer.cpp
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@ -24,8 +24,7 @@ KResultOr<NonnullOwnPtr<KString>> UserOrKernelBuffer::try_copy_into_kstring(size
auto kstring = KString::try_create_uninitialized(size, buffer);
if (!kstring)
return ENOMEM;
if (!copy_from_user(buffer, m_buffer, size))
return EFAULT;
TRY(copy_from_user(buffer, m_buffer, size));
return kstring.release_nonnull();
}
@ -41,7 +40,7 @@ bool UserOrKernelBuffer::write(const void* src, size_t offset, size_t len)
return false;
if (Memory::is_user_address(VirtualAddress(m_buffer)))
return copy_to_user(m_buffer + offset, src, len);
return copy_to_user(m_buffer + offset, src, len).is_success();
memcpy(m_buffer + offset, src, len);
return true;
@ -53,7 +52,7 @@ bool UserOrKernelBuffer::read(void* dest, size_t offset, size_t len) const
return false;
if (Memory::is_user_address(VirtualAddress(m_buffer)))
return copy_from_user(dest, m_buffer + offset, len);
return copy_from_user(dest, m_buffer + offset, len).is_success();
memcpy(dest, m_buffer + offset, len);
return true;
@ -65,7 +64,7 @@ bool UserOrKernelBuffer::memset(int value, size_t offset, size_t len)
return false;
if (Memory::is_user_address(VirtualAddress(m_buffer)))
return memset_user(m_buffer + offset, value, len);
return memset_user(m_buffer + offset, value, len).is_success();
::memset(m_buffer + offset, value, len);
return true;